Virginia gets allowance for a bum (7)
I believe the answer is:
vagrant
'a bum' is the definition.
(I've seen this before)
'virginia gets allowance' is the wordplay.
'virginia' becomes 'va' (US state abbreviation).
'gets' means one lot of letters go next to another.
'allowance' becomes 'grant' (both can mean money given to someone).
'va'+'grant'='VAGRANT'
'for' acts as a link.
(Other definitions for vagrant that I've seen before include "Itinerant" , "nomadic type" , "down-and-out" , "Homeless person" , "One with no fixed abode" .)